The correct option is A.
The DNA from one specie differ from the DNA of another specie on the basis of their base ratio. The base ratio refers to the percentage of purine to pyrimidine in a DNA molecule. The base ratio is the one that is responsible for the variability that is observed in chromosomes from different species.
D) Natural Gas i think is correct sorry if im wrong
<span>D. Congress forced him to retract his idea.
Whereas,
</span><span>Andrew Johnson continued with Lincoln's plan after he became President.</span>
